function fath(uname, age) {
    this.uname = uname
    this.age = age
}
fath.prototype.money = function() {
    console.log(1000000);
}

function Son(uname, age, score) {
    fath.call(this, uname, age);
    this.score = score
}
var son = new Son('aaa', 15, 121)
console.log(son);